Wardens and inmates are assigned to each other in the middle of the month--that would be in about one week [Time Lord senses are handy for keeping track of the relative date]--and at the end of the month. Rarely does the Admiral deviate from his patterns.

Beyond that there's no training manual, no set of standardized guidelines [much to Narvin's dismay], so each warden's technique is different. There are no official rules or laws, since there's no government to write them, no police with the authority to enforce them, and no courts to judge them. Of course, each warden is expected to maintain a certain moral standard. Wardens have been demoted to inmate status in the past when they truly act out of line.